Compression Formats BMP
Unlike Formatov such as TIFF or PSD, BMP in Formate not involve the use of color correction. This means that you can not guarantee that the recipient will see your file image colors the way you define them (let's assume that your colleagues monitor is set to a smaller or larger than you, brightness).
image in BMP Formate can be compressed with RLE (these files usually have the extension. rle instead. bmp). However, files with compression recognized and processed by no means all graphic programs.
Adobe Photoshop allows you to enable compression for files to be saved with a color depth four or eight bits (16 or 256 colors).